INFO: task syz-executor.0:3952 blocked for more than 430 seconds.
      Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:    0 pid: 3952 ppid:  2233 flags:0x00000001
Backtrace: 
[<81712400>] (__schedule) from [<81712e58>] (schedule+0x54/0xdc kernel/sched/core.c:6326)
 r10:8356db00 r9:82c84880 r8:8220c920 r7:8220c5b8 r6:8220c490 r5:8356db08
 r4:8355dc00
[<81712e04>] (schedule) from [<8071abf4>] (blk_mq_freeze_queue_wait+0x6c/0xa4 block/blk-mq.c:178)
 r5:8356db08 r4:8356df70
[<8071ab88>] (blk_mq_freeze_queue_wait) from [<807283a0>] (del_gendisk+0x17c/0x20c block/genhd.c:623)
 r5:83a5b780 r4:00000008
[<80728224>] (del_gendisk) from [<809fc00c>] (loop_remove+0x20/0x58 drivers/block/loop.c:2080)
 r10:83a7e5f0 r9:00000003 r8:83f750c0 r7:00000000 r6:83a7192c r5:8234b6b0
 r4:83a71800 r3:8355dc00
[<809fbfec>] (loop_remove) from [<809fc670>] (loop_control_remove drivers/block/loop.c:2137 [inline])
[<809fbfec>] (loop_remove) from [<809fc670>] (loop_control_ioctl+0x1d8/0x1fc drivers/block/loop.c:2175)
 r5:83a71800 r4:00000000
[<809fc498>] (loop_control_ioctl) from [<804990a8>] (vfs_ioctl fs/ioctl.c:51 [inline])
[<809fc498>] (loop_control_ioctl) from [<804990a8>] (do_vfs_ioctl fs/ioctl.c:834 [inline])
[<809fc498>] (loop_control_ioctl) from [<804990a8>] (__do_sys_ioctl fs/ioctl.c:872 [inline])
[<809fc498>] (loop_control_ioctl) from [<804990a8>] (sys_ioctl+0x110/0xaa0 fs/ioctl.c:860)
 r6:83f750c1 r5:00000000 r4:00004c81
[<80498f98>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64)
Exception stack(0x85215fa8 to 0x85215ff0)
5fa0:                   00000000 00000000 00000003 00004c81 00000000 00000000
5fc0: 00000000 00000000 00000000 00000036 7e98031a 76f526d0 7e9804a4 76f5220c
5fe0: 76f52048 76f52038 00018e9c 0004ba40
 r10:00000036 r9:8355dc00 r8:80200244 r7:00000036 r6:00000000 r5:00000000
 r4:00000000
NMI backtrace for cpu 0
CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: ARM-Versatile Express
Backtrace: 
[<816f56d0>] (dump_backtrace) from [<816f58bc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:237)
 r7:00000000 r6:00000000 r5:60000093 r4:81d6017c
[<816f58a4>] (show_stack) from [<816fe314>] (__dump_stack lib/dump_stack.c:88 [inline])
[<816f58a4>] (show_stack) from [<816fe314>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106)
[<816fe2cc>] (dump_stack_lvl) from [<816fe338>] (dump_stack+0x18/0x1c lib/dump_stack.c:113)
 r5:00000013 r4:00000000
[<816fe320>] (dump_stack) from [<8083cd6c>] (nmi_cpu_backtrace+0x114/0x180 lib/nmi_backtrace.c:105)
[<8083cc58>] (nmi_cpu_backtrace) from [<8083ceec>] (nmi_trigger_cpumask_backtrace+0x114/0x1d0 lib/nmi_backtrace.c:62)
 r7:00000000 r6:8220c494 r5:8220cc70 r4:00000000
[<8083cdd8>] (nmi_trigger_cpumask_backtrace) from [<80210c54>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:865)
 r9:0000db40 r8:82204d00 r7:00007f69 r6:824839b0 r5:8220c5d4 r4:8342a940
[<80210c3c>] (arch_trigger_cpumask_backtrace) from [<80329f7c>] (trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline])
[<80210c3c>] (arch_trigger_cpumask_backtrace) from [<80329f7c>] (check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline])
[<80210c3c>] (arch_trigger_cpumask_backtrace) from [<80329f7c>] (watchdog+0x4a0/0x58c kernel/hung_task.c:295)
[<80329adc>] (watchdog) from [<8026a518>] (kthread+0x164/0x198 kernel/kthread.c:327)
 r10:8294de4c r9:00000000 r8:00000000 r7:80329adc r6:828cf180 r5:82a89240
 r4:828f2e00
[<8026a3b4>] (kthread) from [<80200100>] (ret_from_fork+0x14/0x34 arch/arm/kernel/entry-common.S:146)
Exception stack(0x82a25fb0 to 0x82a25ff8)
5fa0:                                     00000000 00000000 00000000 00000000
5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8026a3b4
 r4:82a89240
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 2019 Comm: klogd Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: ARM-Versatile Express
PC is at 0x1550c
LR is at 0x57338
pc : [<0001550c>]    lr : [<00057338>]    psr: 200e0010
sp : 7e9b6cc8  ip : 00000000  fp : 0000000a
r10: 000d6c90  r9 : 000d6c90  r8 : 000d6880
r7 : 00000000  r6 : 00000000  r5 : 000d6880  r4 : 000d68dc
r3 : 000d6883  r2 : 000d6883  r1 : 000b99d6  r0 : 00000003
Flags: nzCv  IRQs on  FIQs on  Mode USER_32  ISA ARM  Segment none
Control: 30c5387d  Table: 83a9a480  DAC: 00000000
CPU: 1 PID: 2019 Comm: klogd Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: ARM-Versatile Express
Backtrace: 
[<816f56d0>] (dump_backtrace) from [<816f58bc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:237)
 r7:00000017 r6:837d9fb0 r5:600e0193 r4:81d6017c
[<816f58a4>] (show_stack) from [<816fe314>] (__dump_stack lib/dump_stack.c:88 [inline])
[<816f58a4>] (show_stack) from [<816fe314>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106)
[<816fe2cc>] (dump_stack_lvl) from [<816fe338>] (dump_stack+0x18/0x1c lib/dump_stack.c:113)
 r5:000e0193 r4:00000001
[<816fe320>] (dump_stack) from [<80209080>] (show_regs+0x14/0x18 arch/arm/kernel/process.c:199)
[<8020906c>] (show_regs) from [<8083cd54>] (nmi_cpu_backtrace+0xfc/0x180 lib/nmi_backtrace.c:103)
[<8083cc58>] (nmi_cpu_backtrace) from [<8020fd58>] (do_handle_IPI+0x4c/0x3b4 arch/arm/kernel/smp.c:680)
 r7:00000017 r6:00000001 r5:8280cb80 r4:00000007
[<8020fd0c>] (do_handle_IPI) from [<802100e0>] (ipi_handler+0x20/0x28 arch/arm/kernel/smp.c:708)
 r9:000d6c90 r8:837d9f18 r7:00000017 r6:8220cc8c r5:8280cb80 r4:82885d00
[<802100c0>] (ipi_handler) from [<802b9530>] (handle_percpu_devid_irq+0x9c/0x2d4 kernel/irq/chip.c:933)
[<802b9494>] (handle_percpu_devid_irq) from [<802b2ba0>] (generic_handle_irq_desc include/linux/irqdesc.h:158 [inline])
[<802b9494>] (handle_percpu_devid_irq) from [<802b2ba0>] (handle_irq_desc kernel/irq/irqdesc.c:646 [inline])
[<802b9494>] (handle_percpu_devid_irq) from [<802b2ba0>] (generic_handle_domain_irq+0x48/0x8c kernel/irq/irqdesc.c:680)
 r10:000d6c90 r9:000d6c90 r8:00000000 r7:df80200c r6:8353d080 r5:00000007
 r4:82888000 r3:802b9494
[<802b2b58>] (generic_handle_domain_irq) from [<8084fa80>] (gic_handle_irq+0x68/0x7c drivers/irqchip/irq-gic.c:372)
 r7:df80200c r6:820a5fc4 r5:df802000 r4:8220cc8c
[<8084fa18>] (gic_handle_irq) from [<81710264>] (generic_handle_arch_irq+0x60/0x80 kernel/irq/handle.c:243)
 r7:837d9fb0 r6:81f092c0 r5:81f092d8 r4:820a5fb8
[<81710204>] (generic_handle_arch_irq) from [<80200dbc>] (__irq_usr+0x5c/0x80 arch/arm/kernel/entry-armv.S:429)
Exception stack(0x837d9fb0 to 0x837d9ff8)
9fa0:                                     00000003 000b99d6 000d6883 000d6883
9fc0: 000d68dc 000d6880 00000000 00000000 000d6880 000d6c90 000d6c90 0000000a
9fe0: 00000000 7e9b6cc8 00057338 0001550c 200e0010 ffffffff
 r9:000d6c90 r8:5bd3e000 r7:8353d080 r6:ffffffff r5:200e0010 r4:0001550c